I have a stored proc but I have no idea what is going on. so anybody could you please explain the stored procedure because based on this I have to modify the other stored procedure.
Here it goes:
**
BEGIN
DECLARE
#return_code int
#rows_deleted int outout
#batch_size int
#purge_before datetime
SET PREFETCH OFF
SELECT #rows_deleted=0,
#return_code=0,
SET rowcount #batch_size
DELETE payee
WHERE cntct_dtm<=#purge_before
SELECT #return_code=##error, #rows_deleted=##rowcount
SET rowcount 0
RETURN #return_code
END
It appears to take two values as input, an int to set the batch size, and datetime to set boundaries for the transaction.
rowcount is set to batch_size to limit the number of rows affected in a single pass
Delete from the payee table where the value of cntct_dtm is before the datetime value passed into the procedure.
Save value ##error(most likely 0/1), and ##rowcount
Change rowcount back to normal
Return saved value of ##error
Related
How to auto increment sequence number once for every run of a stored procedure and how to use it in the where condition of an update statement?
I already assigned a sequence number to the next value in each run, but I'm not able to use it in the where condition.
CREATE OR REPLACE FUNCTION ops.mon_connect_easy()
RETURNS void
LANGUAGE plpgsql
AS $function$
declare
_inserted_rows bigint = 0;
sql_run bigint = 0;
--assigning the sequence number to the variable
select nextval('ops.mon_connecteasy_seq') into run_seq_num;
-- use for selection iteration_id. this is hwere I'm getting stuck
update t_contract c
set end_date = ce.correct_end_date, status='Active',
orig_end_date =ce.correct_end_date
from ops.t_mon_ConnectEasy ce
where c.contract_id = ce.contract_id
and run_seq_num = ??;
nextval() advances the sequence automatically before returning the resulting value. You don't need anything extra. Just use the function in your query directly:
update t_contract c
set end_date = ce.correct_end_date
, status = 'Active'
, orig_end_date = ce.correct_end_date
from ops.t_mon_ConnectEasy ce
where c.contract_id = ce.contract_id
and iteration_id = nextval('ops.mon_connecteasy_seq');
Be aware that concurrent transactions also might advance the sequence, creating virtual gaps in the sequential numbers.
And I have a nagging suspicion that this might not be the best way to achieve your undisclosed goals.
I would like to compare mean values of two groups using proc ttest, and I successfully did it as below.
proc ttest;
class group;
var score;
run;
But, this code just assumes observations with group = 0 as the default group. So, the t-statistics is calculated based on Mean (score of obs with group= 0) minus Mean (score of obs with group= 1). But, I would like to have it the other way around.
It would just change the sign of t-statistics, but it's just what I wanted to do.
Is there an option to do so by simply adding an option?
I know I could have done it if I have made another dummy variable which is exactly the opposite of my group variable. But, I don't want to create more dummy variables.
ORDER=DATA will tell SAS to order the class variable based on when it encounters the values. So if the 1 values are earlier than the 0 values, it will be first in the comparison.
For example:
data for_ttest;
call streaminit(7);
do group = 0 to 1;
do _n_ = 1 to 50;
score = rand('NORMAL',1,0.5)+group;
output;
end;
end;
run;
proc sort data=for_ttest;
by descending group;
run;
proc ttest data=for_ttest order=data;
class group;
var score;
run;
Without ORDER=DATA, it behaves as you saw, but with it, 1 is the first group.
You could also combine ORDER=FORMATTED with a format.
proc format;
value groupf
1="Group 1 (Value=1)"
0="Group 2 (Value=0)"
;
quit;
proc ttest data=for_ttest order=formatted;
class group;
format group groupf.;
var score;
run;
The labels in the PROC FORMAT are irrelevant, other than that they must be alphabetically sorted. Unfortunately the PRELOADFMT option is not available in PROC TTEST, so you can't use the NOTSORTED trick in PROC FORMAT to allow this to work even with the original values (though you can use non-printing characters to mess with sort order if you really want to).
I have a dataset of CASE_ID (x y and z), a set of multiple dates (including duplicate dates) for each CASE_ID, and a variable VAR. I would like to create a dummy variable DUMMYVAR by group within a group whereby if VAR="C" for CASE_ID x on some specific date, then DUMMYVAR=1 for all observations corresponding to CASE_ID x on with that date.
I believe that a Classic 2XDOW would be the key here but this is my third week using SAS and having difficulty getting this by two BY groups here.
I have referenced and attempted to write a variation of Haikuo's code here:
PROC SORT have;
by CASE_ID DATE;
RUN;
data want;
do until (last.DATE);
set HAVE;
by date notsorted;
if var='c' then DUMMYVAR=1;
do until (last.DATE);
set HAVE;
by DATE notsorted;
if DATE=1 then ????????
end;
run;
Change your BY statements to match the grouping you are doing. And in the second loop add a simple OUTPUT; statement. Then your new dataset will have all the rows in your original dataset and the new variable DUMMYVAR.
data want;
do until (last.DATE);
set HAVE;
by case_id date;
if var='c' then DUMMYVAR=1;
end;
do until (last.DATE);
set HAVE;
by case_id date;
output;
end;
run;
This will create the variable DUMMYVAR with values of either 1 or missing. If you want the values to be 1 or 0 then you could either set it to 0 before the first DO loop. Or add if first.date then dummyvar=0; statement before the existing IF statement.
How do I create/declare variables with a counter in the name on a MS SQL Server?
I have a "for-like" loop with CURSOR and
WHILE ##FETCH_STATUS = 0
BUT: the number of those values is changing continuously. So i want to write every value in an own variable. My goal is to get var-names like : #var1, next loop #var2, next #var3 etc.
Well
SET #counter = (#counter + 1)
is not THAT difficult, but how do I add the value(!) of #counter to the name(!) of #var?
THX a LOT!
I think you should create a temp table to store these variables. For example:
DECLARE #ValTable TABLE
(
ID int,
Val int, -- or any type you need
)
Now insert a new value:
SET #counter = (#counter + 1);
INSERT INTO #ValTable VALUES (#counter, <VALUE>);
To get this value [i] use simple select:
SELECT Val FROM #ValTable where ID=<Number of value here>;
I don't really understand what you are trying to achieve, but a way to do it would be to build the query string within your for loop as you want it to be than execute it to get the result formatted as you want it.
I have a SP with which I fetch a defined amount of rows. How can I change the value of a column in the fetched rows? Such as 'has been fetched' = 1.
Any advice?
EDIT:
The SP looks something like this
SET ROWCOUNT #numberOfRows
SELECT * FROM tableA where notSent = 1
I would like to change the 'notSent' colum for all the rows that i fetch. Is this possible?
1) Don't use Select * in a stored procedure - always specifically list the fields required as shown below - replace field1,2,3 etc with the actual fields you want returned.
OK - Modified answer:
2) Set a flag on the columns you want to select and update with a value that will not be otherwise programmatically set - e.g. -1 - Then select these records, then update them to set the final value required. Doing it this way will avoid the possibility that you will update a different set of records to those selected, due to inserts occurring half-way through the stored procedure's execution. You could also avoid this by use of locks, but the way below is going to be far healthier.
UPDATE Table set notSent = -1 WHERE notSent = 0
SELECT ... from Table where notSent = -1
UPDATE Table set notSent = 1 where notSent = -1